Fix bug in chunk encoder

examples/basic.rs

@@ -7,8 +7,8 @@ use valence::client::GameMode;
 use valence::config::{Config, ServerListPing};
 use valence::text::Color;
 use valence::{
-    async_trait, ChunkPos, ClientMut, DimensionId, Server, ShutdownResult, Text, TextFormat,
-    WorldId, WorldsMut,
+    async_trait, ChunkPos, ClientMut, DimensionId, EntityType, Server, ShutdownResult, Text,
+    TextFormat, WorldId, WorldsMut,
 };
 
 pub fn main() -> ShutdownResult {
@@ -83,14 +83,38 @@ impl Config for Game {
                 if x != -size && x != size - 1 && z != -size && z != size - 1 {
                     for z in 0..16 {
                         for x in 0..16 {
-                            for y in 0..50 {
-                                chunk.set_block_state(x, y, z, BlockState::STONE);
+                            let block_x = pos.x * 16 + x as i32;
+                            let block_z = pos.z * 16 + z as i32;
+
+                            let height = 50.0
+                                + ((block_x as f64 / 10.0).cos() + (block_z as f64 / 10.0).sin())
+                                    * 7.0;
+
+                            for y in 0..height.round() as usize {
+                                let states = [
+                                    BlockState::ACACIA_PLANKS,
+                                    BlockState::SLIME_BLOCK,
+                                    BlockState::IRON_BLOCK,
+                                    BlockState::SEA_LANTERN,
+                                    BlockState::STONE,
+                                    BlockState::DIRT,
+                                    BlockState::PRISMARINE_BRICKS,
+                                    BlockState::DIAMOND_ORE,
+                                ];
+
+                                chunk.set_block_state(x, y, z, states[y % states.len()]);
                             }
                         }
                     }
                 }
             }
         }
+
+        let entity_id = world.entities.create();
+        let mut entity = world.entities.get_mut(entity_id).unwrap();
+
+        entity.set_type(EntityType::Cow);
+        entity.set_position([0.0, 50.0, 0.0]);
     }
 
     fn update(&self, server: &Server, mut worlds: WorldsMut) {

src/chunk.rs

@@ -59,9 +59,9 @@ impl<'a> ChunksMut<'a> {
         Self(chunks)
     }
 
-    pub fn create(&mut self, pos: ChunkPos) -> bool {
+    pub fn create(&mut self, pos: impl Into<ChunkPos>) -> bool {
         let chunk = Chunk::new(self.section_count, self.server.current_tick());
-        self.0.chunks.insert(pos, chunk).is_none()
+        self.0.chunks.insert(pos.into(), chunk).is_none()
     }
 
     pub fn delete(&mut self, pos: ChunkPos) -> bool {
@@ -358,14 +358,12 @@ fn build_heightmap(sections: &[ChunkSection], heightmap: &mut Vec<i64>) {
 }
 
 fn encode_paletted_container(
-    entries: impl ExactSizeIterator<Item = u16> + Clone,
+    mut entries: impl ExactSizeIterator<Item = u16> + Clone,
     min_bits_per_idx: usize,
     direct_threshold: usize,
     direct_bits_per_idx: usize,
     w: &mut impl Write,
 ) -> anyhow::Result<()> {
-    let entries_len = entries.len();
-
     let mut palette = Vec::new();
 
     for entry in entries.clone() {
@@ -391,10 +389,12 @@ fn encode_paletted_container(
 
         VarInt(u64_count as i32).encode(w)?;
 
-        for entry in entries {
+        for _ in 0..idxs_per_u64 {
             let mut val = 0u64;
             for i in 0..idxs_per_u64 {
-                val |= (entry as u64) << (i * direct_bits_per_idx);
+                if let Some(entry) = entries.next() {
+                    val |= (entry as u64) << (i * direct_bits_per_idx);
+                }
             }
             val.encode(w)?;
         }
@@ -411,15 +411,17 @@ fn encode_paletted_container(
 
         VarInt(u64_count as i32).encode(w)?;
 
-        for entry in entries {
-            let palette_idx = palette
-                .iter()
-                .position(|&e| e == entry)
-                .expect("entry should be in the palette") as u64;
-
+        for _ in 0..u64_count {
             let mut val = 0u64;
             for i in 0..idxs_per_u64 {
-                val |= palette_idx << (i * bits_per_idx);
+                if let Some(entry) = entries.next() {
+                    let palette_idx = palette
+                        .iter()
+                        .position(|&e| e == entry)
+                        .expect("entry should be in the palette") as u64;
+                    
+                    val |= palette_idx << (i * bits_per_idx);
+                }    
             }
             val.encode(w)?;
         }
@@ -428,14 +430,6 @@ fn encode_paletted_container(
     Ok(())
 }
 
-/// Encode a paletted container where all values are the same.
-fn encode_paletted_container_single(entry: u16, w: &mut impl Write) -> anyhow::Result<()> {
-    0u8.encode(w)?; // bits per idx
-    VarInt(entry as i32).encode(w)?; // single value
-    VarInt(0).encode(w)?; // data array length
-    Ok(())
-}
-
 /// Calculates the log base 2 rounded up.
 fn log2_ceil(n: usize) -> usize {
     n.next_power_of_two().trailing_zeros() as usize

src/client.rs

@@ -505,7 +505,9 @@ impl<'a> ClientMut<'a> {
         self.0.loaded_entities.retain(|&id| {
             if let Some(entity) = entities.get(id) {
                 if self.0.new_position.distance(entity.position()) <= view_dist as f64 * 16.0 {
-                    todo!("update entity");
+                    if let Some(meta) = entity.updated_metadata_packet(id) {
+                        send_packet(&mut self.0.send, meta);
+                    }
                     return true;
                 }
             }

src/entity.rs

@@ -16,7 +16,7 @@ use crate::packets::play::{
     ClientPlayPacket, EntityMetadata, SpawnEntity, SpawnExperienceOrb, SpawnLivingEntity,
     SpawnPainting, SpawnPlayer,
 };
-use crate::protocol::ReadToEnd;
+use crate::protocol::RawBytes;
 use crate::slotmap::{Key, SlotMap};
 use crate::util::aabb_from_bottom_and_size;
 use crate::var_int::VarInt;
@@ -172,8 +172,8 @@ pub struct EntityId(Key);
 
 impl EntityId {
     pub(crate) fn to_network_id(self) -> i32 {
-        // TODO: is ID 0 reserved?
-        self.0.index() as i32
+        // ID 0 is reserved for clients.
+        self.0.index() as i32 + 1
     }
 }
 
@@ -271,7 +271,7 @@ impl Entity {
     pub(crate) fn initial_metadata_packet(&self, this_id: EntityId) -> Option<EntityMetadata> {
         self.meta.initial_metadata().map(|meta| EntityMetadata {
             entity_id: VarInt(this_id.to_network_id()),
-            metadata: ReadToEnd(meta),
+            metadata: RawBytes(meta),
         })
     }
 
@@ -281,7 +281,7 @@ impl Entity {
     pub(crate) fn updated_metadata_packet(&self, this_id: EntityId) -> Option<EntityMetadata> {
         self.meta.updated_metadata().map(|meta| EntityMetadata {
             entity_id: VarInt(this_id.to_network_id()),
-            metadata: ReadToEnd(meta),
+            metadata: RawBytes(meta),
         })
     }
 

src/lib.rs

@@ -31,7 +31,7 @@ pub use block_pos::BlockPos;
 pub use chunk::{Chunk, ChunkPos, Chunks, ChunksMut};
 pub use client::{Client, ClientMut, Clients, ClientsMut};
 pub use config::{Biome, BiomeId, Config, Dimension, DimensionId};
-pub use entity::{Entities, EntitiesMut, Entity, EntityId};
+pub use entity::{Entities, EntitiesMut, Entity, EntityId, EntityType};
 pub use identifier::Identifier;
 pub use server::{start_server, NewClientData, Server, ShutdownResult};
 pub use text::{Text, TextFormat};

src/packets.rs

@@ -18,7 +18,7 @@ use vek::{Vec2, Vec3};
 use crate::block_pos::BlockPos;
 use crate::byte_angle::ByteAngle;
 use crate::identifier::Identifier;
-use crate::protocol::{BoundedArray, BoundedInt, BoundedString, Decode, Encode, Nbt, ReadToEnd};
+use crate::protocol::{BoundedArray, BoundedInt, BoundedString, Decode, Encode, Nbt, RawBytes};
 use crate::var_int::VarInt;
 use crate::var_long::VarLong;
 use crate::Text;
@@ -1028,7 +1028,7 @@ pub mod play {
     def_struct! {
         EntityMetadata 0x4d {
             entity_id: VarInt,
-            metadata: ReadToEnd,
+            metadata: RawBytes,
         }
     }
 
@@ -1246,7 +1246,7 @@ pub mod play {
     def_struct! {
         PluginMessageServerbound 0x0a {
             channel: Identifier,
-            data: ReadToEnd,
+            data: RawBytes,
         }
     }
 

src/protocol.rs

@@ -519,17 +519,17 @@ impl Decode for BitBox<u64> {
 /// `Vec<u8>`. When encoding, the data is inserted into the packet with no
 /// length prefix.
 #[derive(Clone, Debug)]
-pub struct ReadToEnd(pub Vec<u8>);
+pub struct RawBytes(pub Vec<u8>);
 
-impl Decode for ReadToEnd {
+impl Decode for RawBytes {
     fn decode(r: &mut impl Read) -> anyhow::Result<Self> {
         let mut buf = Vec::new();
         r.read_to_end(&mut buf)?;
-        Ok(ReadToEnd(buf))
+        Ok(RawBytes(buf))
     }
 }
 
-impl Encode for ReadToEnd {
+impl Encode for RawBytes {
     fn encode(&self, w: &mut impl Write) -> anyhow::Result<()> {
         w.write_all(&self.0).map_err(|e| e.into())
     }